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Showing 141 - 160 of 617 results
  • Evaluating AERMOD With Measurements From a Major US Airport Located on a Shoreline
    Evaluating AERMOD With Measurements From a Major U.S. Airport Located on a Shoreline
    Pandey, Gavendra ;
    Venkatram, Akula
    2022-11-01 | PDF
    The impact of airport operations on air quality is a key public health concern for the population surrounding an airport. Air pollution regulations require the assessment of this impact using dispersion models. Modeling dispersion of aircraft-related sources poses challenges because of the large number and variety of airport sources, which include ...
  • Evaluation of Physicochemical Variability of Sustainable Aviation Fuels
    Evaluation of Physicochemical Variability of Sustainable Aviation Fuels
    Oldani, Anna L ;
    Solecki, Alexandra E
    2022-11-01 | PDF
    This study outlines an effort to report on the physicochemical variability of Sustainable Aviation Fuels (SAF), leveraging data from the FAA Alternative Jet Fuels Test Database (AJFTD). The AJFTD, containing fuel sample records of conventional and sustainable aviation fuels to date, was developed by the PIs through the FAA Center of Excellence (ASC ...
  • Secondary Sonic Boom Predictions for US Coastlines
    Secondary Sonic Boom Predictions for U.S. Coastlines
    Riegel, Kimberly A ;
    Sparrow, Victor W.
    2022-11-01 | PDF
    This study examines the behavior of secondary sonic booms on United States (U.S.) coastlines to have a more complete understanding of the impact of supersonic travel on communities. Secondary sonic booms occur when the atmospheric conditions are such that the atmospheric refraction causes the sound that would ordinarily not reach the ground to bend ...
  • Enough Fluff Returning to Meaningful Perspectives on Automation
    Enough Fluff: Returning to Meaningful Perspectives on Automation
    Kaliardos, William N. (Bill)
    ORCID ICON IMG
    2022-09-01 | PDF
    As society progresses towards increased automation in aviation—such as with Advanced Air Mobility and Unmanned Aircraft Systems—it is important to have a common understanding and perspective about automation among the many stakeholders, including aviation system designers, operators, maintainers, and regulatory authorities. Unfortunately, the disco ...
  • Editorial The Motivations for and the Value Proposition of Sustainable Aviation Fuels
    Editorial: The Motivations for and the Value Proposition of Sustainable Aviation Fuels
    Lewis, Kristin C. ;
    Brown, Nathan
    2022-09-01 | PDF
    Editorial on the Research Topic: The motivations for and the value proposition of sustainable aviation fuels.
  • Changes in Ultrafine Particle Concentrations near a Major Airport Following Reduced Transportation Activity during the COVID19 Pandemic
    Changes in Ultrafine Particle Concentrations near a Major Airport Following Reduced Transportation Activity during the COVID-19 Pandemic
    Mueller, Sean C ;
    Hudda, Neelakshi
    2022-08-01 | PDF
    Mobility reductions following the COVID-19 pandemic in the United States were higher, and sustained longer, for aviation than ground transportation activity. We evaluate changes in ultrafine particle (UFP, Dp ...
  • Synthetic Aromatic Kerosene Property Prediction Improvements With Isomer Specific Characterization via GCxGC and Vacuum Ultraviolet Spectroscopy
    Synthetic Aromatic Kerosene Property Prediction Improvements With Isomer Specific Characterization via GCxGC and Vacuum Ultraviolet Spectroscopy
    Feldhausen, John ;
    Bell, David C
    2022-07-01 | PDF
    This research explores an advanced method of fuel composition determination and builds upon typical hydrocarbon group type analyses performed with two-dimensional gas chromatography (GCxGC). In this study, structural information of individual species within Virent’s Synthetic Aromatic Kerosene (SAK) is identified by vacuum ultraviolet (VUV) spectro ...
  • ATC Signaling The Role of Alarms Alerts and Warnings Phase 3 Interim Report Handbook Development
    ATC Signaling: The Role of Alarms, Alerts, and Warnings Phase 3 Interim Report: Handbook Development
    Ruskin, Keith J ;
    Rice, Stephen
    2022-06-01 | PDF
    The Federal Aviation Administration’s air traffic control organization (ATO) encompasses a variety of facilities that include towers, terminal radar approach control facilities (TRACONs), and air route traffic control centers (ARTCCs). Well trained air traffic controllers using effective automation can exploit alarms, alerts and warnings (collectiv ...
  • The Economic Impact of a Renewable BiofuelsEnergy Industry Supply Chain Using the Renewable Energy Economic Analysis Layers Modeling System
    The Economic Impact of a Renewable Biofuels/Energy Industry Supply Chain Using the Renewable Energy Economic Analysis Layers Modeling System
    English, Burton C ;
    Menard, R Jamey
    2022-05-01 | PDF
    The University of Tennessee’s (UT) Department of Agricultural and Resource Economics models supply chains for both liquid and electricity generating technologies currently in use and/or forthcoming for the bio/renewable energy industry using the input–output model IMPLAN®. The approach for ethanol, biodiesel, and other liquid fuels includes the est ...
  • AircraftEngine Particulate Matter Emissions From Conventional and Sustainable Aviation Fuel Combustion Comparison of Measurement Techniques for Mass Number and Size
    Aircraft-Engine Particulate Matter Emissions From Conventional and Sustainable Aviation Fuel Combustion: Comparison of Measurement Techniques for Mass, Number, and Size
    Corbin, Joel C ;
    Schripp, Tobias
    2022-05-01 | PDF
    Sustainable aviation fuels (SAFs) have different compositions compared to conventional petroleum jet fuels, particularly in terms of fuel sulfur and hydrocarbon content. These differences may change the amount and physicochemical properties of volatile and non-volatile particulate matter (nvPM) emitted by aircraft engines. In this study, we evaluat ...
  • Dynamics and Bifurcations of Laminar Annular Swirling and NonSwirling Jets
    Dynamics and Bifurcations of Laminar Annular Swirling and Non-Swirling Jets
    Douglas, Christopher M ;
    Emerson, Benjamin
    2022-05-01 | PDF
    This paper presents bifurcation analyses characterising the nonlinear dynamics of fully developed laminar annular jets with respect to the centrebody diameter d, Reynolds number Re, and swirl ratio S. Similar flows appear in numerous applications and feature a vibrant range of topological and dynamical characteristics associated with phenomena incl ...
  • Sensitivities of Aircraft Acoustic Metrics to Engine Design Variables for Multidisciplinary Optimization
    Sensitivities of Aircraft Acoustic Metrics to Engine Design Variables for Multidisciplinary Optimization
    Voet, Laurens J. A. ;
    Prakash, Prashanth
    2022-05-01 | PDF
    Aircraft environmental performance metrics including fuel burn, takeoff and landing noise, and gaseous emissions are increasingly driving the design and optimization of modern aircraft engines. Gradient-based methods can significantly reduce the computational resources required during their multidisciplinary optimizations. However, current state-of ...
  • A DataDriven Approach to Departure and Arrival Noise Abatement Flight Procedure Development
    A Data-Driven Approach to Departure and Arrival Noise Abatement Flight Procedure Development
    Mahseredjian, Ara ;
    Huynh, Jacqueline L.
    2022-05-01 | PDF
    An aircraft noise modeling framework is presented and used to perform a data-driven exploration of factors correlating with measured aircraft community noise and a model-based validation of the variables found to have the greatest noise impact. Aggregate departure and arrival noise and flight procedures were examined so that factors correlating wit ...
  • Methodology for Quantifying the Impact of Repurposing Existing Manufacturing Facilities Case Study Using Pulp and Paper Facilities for Sustainable Aviation Fuel Production
    Methodology for Quantifying the Impact of Repurposing Existing Manufacturing Facilities: Case Study Using Pulp and Paper Facilities for Sustainable Aviation Fuel Production
    Brandt, Kristin ;
    Camenzind, Dane
    2022-04-01 | PDF
    Sustainable aviation fuel (SAF) is vital for the reduction of the environmental impact of the aviation industry while decreasing the dependence of the USA on foreign petroleum fuels. To date, SAF, especially from cellulosic feedstocks, have struggled to overcome two barriers: (1) meeting price parity with their petroleum counterparts and (2) the la ...
  • Touch User Interfaces in Air Traffic Control Final Guidelines Report with Recommended Updates for the FAA Human Factors Design Standard HFDS FAA HFSTD001B
    Touch User Interfaces in Air Traffic Control: Final Guidelines Report with Recommended Updates for the FAA Human Factors Design Standard (HFDS) [FAA HF-STD-001B]
    Dodd, Sonia ;
    Lubold, Nichola
    2022-03-16 | PDF
    The objective of this effort is to identify human factors issues and generate guidelines and recommendations for updating the FAA Human Factors Design Standard (HFDS) [FAA HF-STD-001B], touch based user-interface (TUI) section. Technical tasks consist of conducting a literature review, a gap analysis with recommendations for future research and a g ...
  • Advanced Fuel Property Data Platform Overview and Potential Applications
    Advanced Fuel Property Data Platform: Overview and Potential Applications
    Blakey, Simon ;
    Rauch, Bastian
    2022-03-01 | PDF
    This report outlines the establishment of distributed databases for management and integration of current and future aviation fuels. Aviation fuel property and performance data has been gathered for many years in public and company specific fuel surveys. These surveys are suitable for use as overall quality control information and for monitoring ch ...
  • Cumulative Impact of Federal and State Policy on Minimum Selling Price of Sustainable Aviation Fuel
    Cumulative Impact of Federal and State Policy on Minimum Selling Price of Sustainable Aviation Fuel
    Brandt, Kristin ;
    Martinez-Valencia, Lina
    2022-03-01 | PDF
    With jet fuel consumption projected to more than double by 2050, dramatic expansion of sustainable aviation fuel (SAF) use will be essential to meeting the aviation industry goal of achieving carbon neutrality in the same time frame. However, to date, the SAF price has, in part, been responsible for the lack of widespread adoption signaling the nee ...
  • Impacts of a NearFuture Supersonic Aircraft Fleet on Atmospheric Composition and Climate
    Impacts of a Near-Future Supersonic Aircraft Fleet on Atmospheric Composition and Climate
    Eastham, Sebastian D ;
    Fritz, Thibaud M
    2022-02-01 | PDF
    Supersonic aircraft will have environmental impacts distinct from those of subsonic aviation, and are once again being developed and bought. Assessments of supersonic aircraft emissions impacts over the last decade have focused on the ozone and climate impacts of nitrogen oxides and water vapor, but assumed zero-sulfur fuel, zero black carbon emiss ...
  • Air Carrier Training Recommendations to Address Limitations of Pilot Procedures during Unexpected Events in NextGen Operations Task 3 Pilot Needs Analysis
    Air Carrier Training Recommendations to Address Limitations of Pilot Procedures during Unexpected Events in NextGen Operations. Task 3: Pilot Needs Analysis
    Cruit, Jessica ;
    Kochan, Janeen A
    2022-02-01 | PDF
    We present the results of a Subject Matter Expert knowledge elicitation study conducted with US Air Carrier pilots, instructor pilots, and evaluators through a semi-structured interview process. The goal of the study was to support or refute the body of research on pilot performance in responding to unexpected events presented in Task 2 from this r ...
  • Relevant Research Assessment Concerning Pilot Response to Unexpected Events Task 2 Relevant Research Assessment
    Relevant Research Assessment Concerning Pilot Response to Unexpected Events. Task 2: Relevant Research Assessment
    Hancock, P. A. ;
    Cruit, Jessica
    2022-02-01 | PDF
    This report provides a review of the existent information pertinent to the response to novel, unexpected, surprising, and/or unanticipated events, primarily focused on the context of aviation. The primary effort here is to identify ways in which to mitigate the brittleness of accepted traditional forms of response and to foster both adaptive and re ...
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